This is /proc/scsi for my PC (booted from a disk managed by sata_sil): # ls -ld $(find /proc/scsi ) dr-xr-xr-x 3 root root 0 Aug 5 08:32 /proc/scsi -r--r--r-- 1 root root 0 Aug 5 08:32 /proc/scsi/device_info -r--r--r-- 1 root root 0 Aug 5 08:32 /proc/scsi/scsi dr-xr-xr-x 2 root root 0 Aug 5 08:32 /proc/scsi/usb-storage -rw-r--r-- 1 root root 0 Aug 5 08:32 /proc/scsi/usb-storage/2